Question

我想使用sequelize.js查询带有包含约束的记录的模型。我该怎么做？

这就是我现在所拥有的：

Assets
  .findAll({ limit: 10, where: ["asset_name like ?", '%' + request.body.query + '%'] })
  .then(function(assets){
    return response.json({
      msg: 'search results',
      assets: assets
    });
  })
  .catch(function(error){
    console.log(error);
  });

但是我收到以下错误：

   { error: operator does not exist: character varying @> unknown
       at Connection.parseE (/home/travellr/safe-star.com/SafeStar/node_modules/pg/lib/connection.js:554:11)
       at Connection.parseMessage (/home/travellr/safe-star.com/SafeStar/node_modules/pg/lib/connection.js:381:17)
       at Socket.<anonymous> (/home/travellr/safe-star.com/SafeStar/node_modules/pg/lib/connection.js:117:22)
       at emitOne (events.js:96:13)
       at Socket.emit (events.js:188:7)
       at readableAddChunk (_stream_readable.js:176:18)
       at Socket.Readable.push (_stream_readable.js:134:10)
       at TCP.onread (net.js:548:20)
     name: 'error',
     length: 209,
     severity: 'ERROR',
     code: '42883',
     detail: undefined,
     hint: 'No operator matches the given name and argument type(s). You might need to add explicit type casts.',
     position: '246',
     internalPosition: undefined,
     internalQuery: undefined,
     where: undefined,
     schema: undefined,
     table: undefined,
     column: undefined,
     dataType: undefined,
     constraint: undefined,
     file: 'parse_oper.c',
     line: '722',
     routine: 'op_error',
     sql: 'SELECT "id", "asset_name", "asset_code", "asset_icon", "asset_background", "asset_add_view", "asset_add_script", "asset_add_id_regex", "date_created", "uniqueValue", "createdAt", "updatedAt" FROM "assets" AS "assets" WHERE "assets"."asset_name" @> \'%a%\' LIMIT 10;' },
  sql: 'SELECT "id", "asset_name", "asset_code", "asset_icon", "asset_background", "asset_add_view", "asset_add_script", "asset_add_id_regex", "date_created", "uniqueValue", "createdAt", "updatedAt" FROM "assets" AS "assets" WHERE "assets"."asset_name" @> \'%a%\' LIMIT 10;' }

如何在sequelize中使用包含查询？

Answer 1

Assets.findAll({
        limit: 10,
        where: {
            asset_name: {
                $like: '%' + request.body.query + '%'
            }
        }
}).then(function(assets){
    return response.json({
        msg: 'search results',
        assets: assets
    });
}).catch(function(error){
    console.log(error);
});

修改

为了使它不区分大小写，您可以使用LOWER sql函数，但之前您还必须小写request.body.query值。 Sequelize查询看起来就像那样

let lookupValue = request.body.query.toLowerCase(); Assets.findAll({ limit: 10, where: { asset_name: sequelize.where(sequelize.fn('LOWER', sequelize.col('asset_name')), 'LIKE', '%' + lookupValue + '%') } }).then(function(assets){ return response.json({ msg: 'message', assets: assets }); }).catch(function(error){ console.log(error); });

它的作用是从表中小写asset_name值，以及小写request.body.query值。在这种情况下，您可以比较两个较低的字符串。

为了更好地了解此案例中发生的情况，我建议您查看有关sequelize.where()，sequelize.fn()以及sequelize.col()的续集文档。尝试执行一些不寻常的查询而不是简单的findAll或findOne时，这些函数非常有用。

在这种情况下sequelize当然是你的Sequelize实例。

Answer 2

如果您更好地使用sequlize，最好使用[Op.iLike]: `%${request.body.query}%`，而您可以忘记sequlize函数。

Sequelize：查找所有匹配包含（不区分大小写）

2 个答案: